Elbeidge wheeler



(No Modem E. WHEELER,l

OMEOUND INGOT MOLD.

No. 363,926. Patented May 31, 1887-.

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UNITED STATES PATENT OFFICE..

ELBRIDGE WHEELER, OF BOSTON, MASSACHUSETTS, ASSIGNOR T O HIMSELF,

WARE B. GAY, AND GEORGE W. GOGIN,TRUSTEES, ALL OF SAME PLACE.

COMPOUND lNGOT-VIOLD.`

SPECIFICATION forming part of Letters Patent No. 363,926, dated May 31,1887.

Application filed April 24, 1886.

To all whom, it may concern.-

Be it known that I, ELEEIDGE WHEELER, of Boston, county of Suffolk, andState of Massachusetts, have invented an Improvement in Compound Molds,of which the following 4description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention relates toa method for producing a compound ingotcomposed of two or more metals or grades of metal united to form ahomogeneous ingot and a mold in which to producesadingot.Thec0mpoundingotcomposed of two or more metalsor grades of metal andproduced in accordance with my invention is especially adapted for theproduction of railroad-rails, shafts, ordnance, and other articles.

My invention is also adapted to be applied to molds of ordinaryconstruction without necessitating any change in the mold itself or inany part of the usualplant. l

In accordance with my invention, I purpose to place within a mold" vofany ordinary construction, and such as is now commonly foundinsteelplants, one or more auxiliary molds composed of sheet metal,preferably steel or iron, made inthe form of cans and4 open at one end.

The auxiliary molds referred to may be placed within the primary mold inany ldesired position to produce an ingot having two or more metals orgrades of metal,said metals bearing to each other any desired relativeposition or proportion. g

The invention consists, rst, in a form of compound mold, and, second, ina method of casting compound ingots,substantially as hereinafterparticularly set forth and claimed.

Figure 1 is an isometric view `of an improved compound mold with whichto practice my invention.' Fig. 2 is a top or end view of a modifiedform of compound mold; Fig. 3,an end View of theingot produced in Fig. 2after4 being worked over a'core; Fig. 4, a top View of a modified formof mold adapted to produce an ingot to be manipulated into a rail, andFig. 5 shows the bonnet or cap for the outside mold. Fig. 6 is a sectionof a mold such as shown in Fig. 1, taken on-liuex; and Fig.

serial No.v 200,023. (No model.)

.7 is a similar section of one of the cans or auxiliary molds removed.

Referring to Fig. 1, A represents a mold of ordinary construction andcomposed of any suitable or usual material.

In accordance with .my invention, I purpose toplace within the mold Aone or more auxiliary molds,B,composed of sheet metal, preferably steelor iron, made up in the form of cans open at one end and having theclosed bottom mi. The auxiliary molds Bv may be of any desired number,herein shown as four; but it is evident said number is limited only bythe size of the mold A, and also by the size of the auxiliary moldsthemselves.

Thev auxiliary molds B will be of proper thickness to hold the metalcastinto them,and at the same time the thickness of the material of thesaid auxiliary molds will not be such as to prevent the said materialfrom fusing when the metal to complete the ingotis cast into the mold,as will be described.

In operation the metal cast into the molds B will-be of a different kindor grade'from that cast into the remaining part of the mold A,andl

marked D. The metal cast into the auxiliary molds may be of the same ordifferent kinds or grades, and when the metal cast into the molds B,(shown in Fig. 1,) is all of one kind or quality it will preferably becast at one operation into all the said molds.

As soon as the metal of one kind or grade has been cast into theauxiliary molds B the metal which is to form the remaining part of theingot will be immediately cast ,into that part of the mold A marked D inFig. 1. The molten metal cast into the auxiliary molds B will heat suchmolds to such a degree that when the remaining metal is cast into thatpart of the mold-marked D thclatter metal will fuse the surface of themetal of the auxiliary molds B, thereby producing a compound ingotcomposed of two or more metals or grades of metal united to form a solidingot.

When the metal to be cast into that part of I the mold A marked Dis notcast immediately after the metal has been cast into the auxiliary molds,the mold A will be covered with abonnet or cap, d,.to exclude theexteriorair. vAir, if permitted to have access to the in- Instead ofcasting one kind of metal intothe auxiliary molds B' a different kind orgrade of metal may be cast into each separate mold B, in which case,when it is not convenient to pour the metals into the said moldssimultaneously, the mold A will be covered by the cap or bonnet d aftereach kind or grade of metal has been cast in its auxiliary mold.

In Fig. 2 I have shown two auxiliary molds B, of the same shape as themold A, said auxiliary molds being herein shown as placed within themold A to leave spaces D, into which is cast a different kind or gradeof metal from that cast into the said auxiliary molds B B, the saidauxiliary molds being herein shown as cans having inner walls, rv, andouter walls, m6,'the bottom of the said cans resting upon the bottom ofthe said molds.

The ingot produced in theccmpound mold shown in Fig. 2 may, if desired,be composed of alternate lamin of metal or grades of metal-such, forinstance, as a low and high grade of steel, or soft iron and steel-oreach lamina may be of a different kind or grade of metal. l

The vcompound ingot formed in the mold shown in Fig. 2 is adapted to beworked over a core, b, in any usual or Well-known manner, to produceordnance, said ordnance being composed of concentric laminze of metal,(shown in Fig. 3,) which may be of different kinds or grades-such, forinstance, as alternate lamin of soft iron in the spaces D and steel inthe molds B, or of different grades of steelthe coreb being placed inthe mold before the u metal is cast therein and being retained duringVitnesses:

for the production of a compound ingot from.4

which to produce rails, having a high carbon steel composing the thread,while the web and ange will be of a lower carbon steel.

The method of casting the compound ingots in the molds (shown in Figs. 2and 4) will be the same as that described above.

It is evident that the mold A may be of any form and size, and that thesaid auxiliary molds may be placed in the mold A in any desired`position with relation t0 the said mold and to each other.-

I claim- 1. A compound mold consisting of an outer flask or mold and anindependent auxiliary mold, in the form of a can open at one end andclosed at the other and placed within said fiask or mold, and into whichmetal is cast, and constructed of a material which will be incorporatedin the ingot by the process of casting substantially as described.

2. That improvement in the art or method of forming a compound ingotwhich consists, rst, in placing in'an louter mold or ask, as desired, aplurality of auxiliary molds; second, casting into each auxiliary mold adifferent kind or grade of metal; third, covering the outer mold orflask with a cap or bon net after each cast in each auxiliary mold, and,lastly, casting into the outer mold or flask a metal or grade of metaldiiferent from the metals or grades of metal in the auxiliary molds,substantially as described.

3. A compound mold consisting of at least one independent auxiliarymold, formed as a can with a closed bottom to receive `one kind or gradeof cast metal, and an outer flask or mold to receive another kind orgrade of cast metal, the metal cast into the outer ask or moldsurrounding the auxiliary mold, substantially as described.

In testimony whereof I have signed my name to this specification inthepresence of two subscrbing witnesses.

ELBRlDGE WHEELER.

B. J. N oYEs, J. H. CHURCHILL.

